Pain in belly. Not getting any relief.

I am having pain in my stomach, it is not at any one place, it is at different places, sometimes on the left side and right side it feels like heaviness in the stomach and feeling some pulling inside the belly. The pain is not continuous, sometimes it lasts for 2 or 3 minutes at one place, then it goes away, it happens 4 or 5 times a day. I got up in the morning to go to the toilet and took it completely fresh. Even after 2 or 3 times  I have to go to the latrine but it does not come out. The color of the latrine also looks black or has a bad smell. I got myself checked in the nearby hospital or they asked me to get an ultrasound done. By doing ultrasound or in our report there are 2 diseases highlighted, one is wild gut edema and gas ++. Then I tried the same medicine but still there was no relief. Then after doing checkup in another hospital they did complete blood count test on me and all the reports were correct. I also took medicine but am still not getting any relief.